1 Atmel NAND flash controller bindings
3 The NAND flash controller node should be defined under the EBI bus (see
4 Documentation/devicetree/bindings/memory-controllers/atmel,ebi.txt).
5 One or several NAND devices can be defined under this NAND controller.
6 The NAND controller might be connected to an ECC engine.
8 * NAND controller bindings:
11 - compatible: should be one of the following
12 "atmel,at91rm9200-nand-controller"
13 "atmel,at91sam9260-nand-controller"
14 "atmel,at91sam9261-nand-controller"
15 "atmel,at91sam9g45-nand-controller"
16 "atmel,sama5d3-nand-controller"
17 "microchip,sam9x60-nand-controller"
18 - ranges: empty ranges property to forward EBI ranges definitions.
19 - #address-cells: should be set to 2.
20 - #size-cells: should be set to 1.
21 - atmel,nfc-io: phandle to the NFC IO block. Only required for sama5d3
23 - atmel,nfc-sram: phandle to the NFC SRAM block. Only required for sama5d3
27 - ecc-engine: phandle to the PMECC block. Only meaningful if the SoC embeds
30 * NAND device/chip bindings:
33 - reg: describes the CS lines assigned to the NAND device. If the NAND device
34 exposes multiple CS lines (multi-dies chips), your reg property will
35 contain X tuples of 3 entries.
36 1st entry: the CS line this NAND chip is connected to
37 2nd entry: the base offset of the memory region assigned to this
39 3rd entry: the memory region size (always 0x800000)
42 - rb-gpios: the GPIO(s) used to check the Ready/Busy status of the NAND.
43 - cs-gpios: the GPIO(s) used to control the CS line.
44 - det-gpios: the GPIO used to detect if a Smartmedia Card is present.
45 - atmel,rb: an integer identifying the native Ready/Busy pin. Only meaningful
48 All generic properties described in
49 Documentation/devicetree/bindings/mtd/{common,nand}.txt also apply to the NAND
50 device node, and NAND partitions should be defined under the NAND node as
51 described in Documentation/devicetree/bindings/mtd/partition.txt.
53 * ECC engine (PMECC) bindings:
56 - compatible: should be one of the following
57 "atmel,at91sam9g45-pmecc"
60 - reg: should contain 2 register ranges. The first one is pointing to the PMECC
61 block, and the second one to the PMECC_ERRLOC block.
63 * SAMA5 NFC I/O bindings:
65 SAMA5 SoCs embed an advanced NAND controller logic to automate READ/WRITE page
66 operations. This interface to this logic is placed in a separate I/O range and
67 should thus have its own DT node.
69 - compatible: should be "atmel,sama5d3-nfc-io", "syscon".
70 - reg: should contain the I/O range used to interact with the NFC logic.
74 nfc_io: nfc-io@70000000 {
75 compatible = "atmel,sama5d3-nfc-io", "syscon";
76 reg = <0x70000000 0x8000000>;
79 pmecc: ecc-engine@ffffc070 {
80 compatible = "atmel,at91sam9g45-pmecc";
81 reg = <0xffffc070 0x490>,
86 compatible = "atmel,sama5d3-ebi";
90 reg = <0x10000000 0x10000000
91 0x40000000 0x30000000>;
92 ranges = <0x0 0x0 0x10000000 0x10000000
93 0x1 0x0 0x40000000 0x10000000
94 0x2 0x0 0x50000000 0x10000000
95 0x3 0x0 0x60000000 0x10000000>;
98 nand_controller: nand-controller {
99 compatible = "atmel,sama5d3-nand-controller";
100 atmel,nfc-sram = <&nfc_sram>;
101 atmel,nfc-io = <&nfc_io>;
102 ecc-engine = <&pmecc>;
103 #address-cells = <2>;
108 reg = <0x3 0x0 0x800000>;
112 * Put generic NAND/MTD properties and
119 -----------------------------------------------------------------------
121 Deprecated bindings (should not be used in new device trees):
124 - compatible: The possible values are:
125 "atmel,at91rm9200-nand"
128 - reg : should specify localbus address and size used for the chip,
129 and hardware ECC controller if available.
130 If the hardware ECC is PMECC, it should contain address and size for
131 PMECC and PMECC Error Location controller.
132 The PMECC lookup table address and size in ROM is optional. If not
133 specified, driver will build it in runtime.
134 - atmel,nand-addr-offset : offset for the address latch.
135 - atmel,nand-cmd-offset : offset for the command latch.
136 - #address-cells, #size-cells : Must be present if the device has sub-nodes
137 representing partitions.
139 - gpios : specifies the gpio pins to control the NAND device. detect is an
140 optional gpio and may be set to 0 if not present.
143 - atmel,nand-has-dma : boolean to support dma transfer for nand read/write.
144 - nand-ecc-mode : String, operation mode of the NAND ecc mode, soft by default.
145 Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first",
147 - atmel,has-pmecc : boolean to enable Programmable Multibit ECC hardware,
148 capable of BCH encoding and decoding, on devices where it is present.
149 - atmel,pmecc-cap : error correct capability for Programmable Multibit ECC
150 Controller. Supported values are: 2, 4, 8, 12, 24. If the compatible string
151 is "atmel,sama5d2-nand", 32 is also valid.
152 - atmel,pmecc-sector-size : sector size for ECC computation. Supported values
154 - atmel,pmecc-lookup-table-offset : includes two offsets of lookup table in ROM
155 for different sector size. First one is for sector size 512, the next is for
156 sector size 1024. If not specified, driver will build the table in runtime.
157 - nand-bus-width : 8 or 16 bus width if not present 8
158 - nand-on-flash-bbt: boolean to enable on flash bbt option if not present false
160 Nand Flash Controller(NFC) is an optional sub-node
162 - compatible : "atmel,sama5d3-nfc".
163 - reg : should specify the address and size used for NFC command registers,
164 NFC registers and NFC SRAM. NFC SRAM address and size can be absent
165 if don't want to use it.
166 - clocks: phandle to the peripheral clock
168 - atmel,write-by-sram: boolean to enable NFC write by SRAM.
171 nand0: nand@40000000,0 {
172 compatible = "atmel,at91rm9200-nand";
173 #address-cells = <1>;
175 reg = <0x40000000 0x10000000
178 atmel,nand-addr-offset = <21>; /* ale */
179 atmel,nand-cmd-offset = <22>; /* cle */
181 nand-ecc-mode = "soft";
182 gpios = <&pioC 13 0 /* rdy */
191 /* for PMECC supported chips */
192 nand0: nand@40000000 {
193 compatible = "atmel,at91rm9200-nand";
194 #address-cells = <1>;
196 reg = < 0x40000000 0x10000000 /* bus addr & size */
197 0xffffe000 0x00000600 /* PMECC addr & size */
198 0xffffe600 0x00000200 /* PMECC ERRLOC addr & size */
199 0x00100000 0x00100000 /* ROM addr & size */
201 atmel,nand-addr-offset = <21>; /* ale */
202 atmel,nand-cmd-offset = <22>; /* cle */
204 nand-ecc-mode = "hw";
205 atmel,has-pmecc; /* enable PMECC */
206 atmel,pmecc-cap = <2>;
207 atmel,pmecc-sector-size = <512>;
208 atmel,pmecc-lookup-table-offset = <0x8000 0x10000>;
209 gpios = <&pioD 5 0 /* rdy */
218 /* for NFC supported chips */
219 nand0: nand@40000000 {
220 compatible = "atmel,at91rm9200-nand";
221 #address-cells = <1>;
226 compatible = "atmel,sama5d3-nfc";
227 #address-cells = <1>;
231 0x70000000 0x10000000 /* NFC Command Registers */
232 0xffffc000 0x00000070 /* NFC HSMC regs */
233 0x00200000 0x00100000 /* NFC SRAM banks */